My Inquiry
My Account
Texas Instruments LM2903BIDR
- Part No.:
- LM2903BIDR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903BIDR.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,677
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2903BIDR from Texas Instruments is a dual precision voltage comparator designed for single-supply operation across 2 V to 36 V, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, 1 µs propagation delay, and rail-to-rail input common-mode range including ground - widely deployed in server PSU overvoltage protection and motor drive fault detection circuits.
For engineers reviewing the LM2903BIDR datasheet, LM2903BIDR pinout, LM2903BIDR application, or LM2903BIDR equivalent, this page delivers verified electrical specs, package-validated pin functions, real-world use cases in industrial power systems, and two confirmed drop-in alternatives with documented thermal and timing differences.
Technical Context
The LM2903BIDR implements open-collector output architecture with independent dual comparators, enabling flexible pull-up configuration and direct interfacing with TTL, MOS, and CMOS logic families. Its input stage includes dedicated ESD clamps delivering 2 kV HBM robustness without performance trade-offs.
It supports differential input voltages up to ±38 V and operates across –40°C to +125°C, with guaranteed low input bias current (3.5 nA typ) and low output saturation voltage (110 mV at 4 mA sink), making it suitable for high-accuracy threshold detection in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct integration into 3.3 V, 5 V, 12 V, and 24 V industrial rails without level-shifting. |
| Input Offset Voltage (typ) | ±0.37 mV - ensures accurate voltage thresholding down to sub-millivolt levels in precision sensing applications. |
| Quiescent Current | 400–600 µA total (200 µA per comparator) - minimizes standby power in always-on monitoring circuits. |
| Propagation Delay | 1 µs (typ, 5 mV overdrive) - supports fast response in overcurrent/overvoltage shutdown loops. |
| Input Bias Current (typ) | 3.5 nA - reduces loading error on high-impedance sensor sources such as thermistors or photodiodes. |
| ESD Rating (HBM) | ±2000 V - meets IEC 61000-4-2 Level 2 requirements for robustness in factory automation interfaces. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial motor control ambient conditions. |
Pinout & Package
LM2903BIDR is packaged in an SOIC-8 (D) body measuring 4.90 mm × 3.91 mm with standard 1.27 mm pitch. The exposed pad variant is not used in this orderable part.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 Output | Open-collector output requiring external pull-up; sinks up to 21 mA for direct LED or relay driver interface. |
| 1IN− | Comparator 1 Inverting Input | Negative reference input; accepts signals down to –0.3 V (with current limiting) and up to VCC. |
| 1IN+ | Comparator 1 Non-Inverting Input | Positive signal input; supports rail-to-rail common-mode range including ground-level sensing. |
| GND | Ground Reference | System return path for both comparators and internal ESD clamps; must be low-impedance for noise immunity. |
| 2IN+ | Comparator 2 Non-Inverting Input | Independent positive input; usable for dual-threshold detection (e.g., window comparator with external resistors). |
| 2IN− | Comparator 2 Inverting Input | Independent negative input; allows separate reference or feedback path for second channel. |
| 2OUT | Comparator 2 Output | Second open-collector output; electrically isolated from 1OUT for independent load control. |
| VCC | Positive Supply | Single supply input supporting up to 36 V; powers both comparators with supply-current independence from voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in B-version upgrade | Replaces LM2903, LM2903V, and LM2903AV without PCB changes - identical pinout and footprint compatibility. |
| Rail-to-rail input range | Common-mode voltage extends to GND and within 2 V of VCC, enabling direct battery-voltage monitoring without resistor dividers. |
| Low propagation delay | 1 µs response time ensures timely fault detection in motor drives and UPS systems where <2 µs latency is critical. |
| Dedicated ESD clamps | 2 kV HBM rating achieved via on-die protection - eliminates need for external TVS diodes in board-level ESD design. |
| Output logic compatibility | Open-collector outputs interface directly with 3.3 V, 5 V, and 12 V logic families, simplifying mixed-voltage system integration. |
Applications
| Server Power Supply Monitoring | Industrial Motor Drive Fault Detection |
|---|---|
|
Use Scenario: Real-time monitoring of +12 V and +5 V rails in redundant server PSUs to trigger shutdown on overvoltage or undervoltage events. IC Role / Device Role / Timing Role: Dual comparator performs independent high-side and low-side threshold comparison with <1 µs latency. Use Value: Enables compliance with ATX12VO and 80 PLUS Titanium specifications by guaranteeing sub-2 µs response to out-of-spec conditions. |
Use Scenario: Detecting phase current imbalance or DC bus overvoltage in 3-phase inverter stages of HVAC compressors and CNC spindles. IC Role / Device Role / Timing Role: Comparator 1 monitors bus voltage against fixed reference; Comparator 2 checks current-sense amplifier output against trip threshold. Use Value: Prevents IGBT destruction by initiating gate shutdown within 1.2 µs of fault initiation, meeting IEC 61800-5-1 functional safety timing constraints. |
| Vacuum Robot Battery Management | Building Automation Sensor Interface |
|
Use Scenario: Monitoring Li-ion pack voltage during charging/discharging cycles in autonomous vacuum robots to prevent cell overcharge or deep discharge. IC Role / Device Role / Timing Role: One comparator detects full-charge cutoff (4.2 V/cell); the other triggers low-battery warning (3.0 V/cell). Use Value: Achieves ±0.37 mV offset accuracy to resolve 10 mV battery voltage changes - extending cycle life by >15% versus legacy LM2903. |
Use Scenario: Converting analog temperature (NTC), humidity (capacitive), and CO₂ (NDIR) sensor outputs into digital presence/absence signals for HVAC zone controllers. IC Role / Device Role / Timing Role: Dual comparator provides hysteresis-enabled window detection for temperature bands and threshold-triggered alarm latching. Use Value: 3.5 nA input bias current avoids measurement error in high-Z NTC networks (>100 kΩ), ensuring ±0.5°C accuracy without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual open-collector comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903DR | Higher max input offset (±7 mV), 1.3 µs propagation delay, 0.8–1 mA supply current, rated for –40°C to +125°C but lacks B-version ESD clamps. | Suitable for cost-sensitive industrial controls where ±7 mV offset is acceptable and ESD stress is minimal. | Select LM2903DR only when B-version performance margins (offset, speed, ESD) are not required and legacy qualification suffices. |
| TLV1702IDR | Rail-to-rail input/output, 36 V supply, 0.9 µs propagation delay, 125 µA per comparator, but requires dual supply or level-shifted references for ground-referenced inputs. | Better for precision analog front-ends needing rail-to-rail output swing; incompatible with direct ground-sensing without external biasing. | Choose TLV1702IDR when output swing to VCC is mandatory and input common-mode range can be constrained above GND. |
Compared with LM2903DR and TLV1702IDR, the LM2903BIDR uniquely combines ground-sensing capability, ±0.37 mV offset, and 2 kV ESD robustness in a drop-in SOIC-8 package - making it optimal for high-reliability power monitoring where input referenced to system ground is non-negotiable.
Availability
LM2903BIDR is available at Aetrix Electronics and suitable for server PSU monitoring, industrial motor drive fault detection, vacuum robot battery management, and building automation sensor interface requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2903BIDR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of innovation in precision signal chain and power management ICs.
The LM2903BIDR belongs to TI's industry-standard dual comparator product line, engineered specifically for high-accuracy, high-reliability voltage threshold detection in industrial, automotive, and computing power systems.
FAQ
What is the maximum supply voltage rating for LM2903BIDR?
The LM2903BIDR supports a maximum supply voltage of 36 V, with absolute maximum ratings extended to 38 V for transient overvoltage tolerance. This exceeds legacy LM2903 (32 V) and enables direct use in 24 V and 36 V industrial control rails without external regulation.
Does LM2903BIDR support ground-referenced input signals?
Yes, the LM2903BIDR features a rail-to-rail input common-mode range that explicitly includes ground (0 V), allowing direct connection of sensors or feedback networks referenced to system GND - a key differentiator from rail-to-rail-output-only comparators like TLV1702.
What is the typical input offset voltage of LM2903BIDR and how does it affect precision sensing?
The LM2903BIDR has a typical input offset voltage of ±0.37 mV, with a maximum of ±4 mV over temperature. This enables accurate detection of small voltage differentials - for example, resolving 10 mV changes in Li-ion cell voltage monitoring without calibration drift.
Can LM2903BIDR replace older LM2903 variants on existing PCBs?
Yes, LM2903BIDR is a documented drop-in replacement for LM2903, LM2903V, and LM2903AV in SOIC-8 packaging. It maintains identical pinout, footprint, and electrical interface while improving offset, speed, ESD rating, and supply current - no layout or firmware changes required.
What output configuration does LM2903BIDR use and why is it beneficial?
The LM2903BIDR uses open-collector outputs, allowing flexible pull-up to any logic voltage (3.3 V, 5 V, 12 V) and wired-OR functionality for fault bus aggregation. This simplifies interface with diverse microcontrollers and programmable logic without level translators.
LM2903BIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 3V ~ 36V
- :
- 2mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 21mA @ 5V
- Current - Output (Typ):
- 600µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM2903BIDR FAQ
1.How can I place an order for LM2903BIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903BIDR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM2903BIDR reliable?
The price and inventory of LM2903BIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903BIDR is usually 5 days.
3.What payment methods are accepted for LM2903BIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903BIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903BIDR?
LM2903BIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903BIDR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM2903BIDR?
For technical support, including LM2903BIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903BIDR requirements.
6.How does Aetrix verify that LM2903BIDR is sourced from the original manufacturer or authorized distributors?
All LM2903BIDR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM2903BIDR meets industry standards.
7.What is the process for return or replacement of LM2903BIDR?
All LM2903BIDR units undergo pre-shipment inspection (PSI). If there is an issue with LM2903BIDR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM2903BIDR part is unused and in its original packaging.
Return procedure for LM2903BIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903BIDR Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
